Replace wires with play dough and circuit building becomes a snack for tiny learners. Watch them figure it all out and you'll see their little faces light up! up
- 1 cup Water
- 1 1/2 cups Flour
- 1/4 cup Salt
- 3 Tbsp. Cream of Tartar (or 9 tablespoons of lemon juice)
- 1 Tbsp. Vegetable Oil
- Food Coloring (optional)
- battery pack
- light emitting diodes/LEDS
- Mix water, 1 cup of flour, salt, cream of tartar, vegetable oil, and food coloring in a medium sized pot.
- Cook over medium heat and stir continuously. Will boil and get chunky.
- Keep stirring the mixture until it forms a ball in the center of the pot.
- Once a ball forms, place the ball on a lightly floured surface. Let cool before kneading.
- Slowly knead the remaining flour into the ball until youve reached a desired consistency.
- Store in an airtight container or plastic bag. If stored properly, the dough should keep for several weeks.
- What happens? You should see the ashes of the teabag fly into the air!
- Make two lumps of ordinary conducting play dough and poke one of the battery pack leads into each lump.
- Now poke one of your LEDs legs into each lump.
- Electricity only flows through LEDs in one direction so, if the LED doesn't light up, take it out, turn it around and poke the legs back into the lumps.
- Once you have all the materials, let the kids sculpt, play and create! Use this activity to talk about electricity and how conductive materials allow it to flow freely.
- Experiment with series and parallel circuits and rolling play-dough into conductive wires.
Why is it so?
A circuit starts and stops at the battery pack, and flows through wires, conductive dough, and electrical components such as LEDs. When the circuit is broken, charges will stop flowing, and LED light will switch off.
Play-dough allows charges to flow through it easily as it is very salty. Salty water conducts electricity, which makes ordinary, salty play dough a reasonably good conductor.